Valve lock



FIG. 1 is a perspective view of the valve lock, showing my design;

FIG. 2 is a front view of the valve lock;

FIG. 3 is an opposing rear side view of the valve lock;

FIG. 4 is a left side view of the valve lock;

FIG. 5 is an opposing right side view of the valve lock; and,

FIG. 6 is a top view of the valve lock.

CLAIM The ornamental design for a valve lock, as shown and described.